Bonjour
un petit mot de politesse la b prochaine fois, stp
CALCUL MENTAL Calculer mentalement.
a. 19×53 +11x53
= 53 x (19 + 11)
= 53 x 30
= 53 x 3 x 10
= 159 x 10
= 1590
b. 67 x 41-17x41
= 41 x (67 - 17)
= 41 x 50
= 41 x 5 x 10
= 205 x 10
= 2050
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Bonjour
un petit mot de politesse la b prochaine fois, stp
CALCUL MENTAL Calculer mentalement.
a. 19×53 +11x53
= 53 x (19 + 11)
= 53 x 30
= 53 x 3 x 10
= 159 x 10
= 1590
b. 67 x 41-17x41
= 41 x (67 - 17)
= 41 x 50
= 41 x 5 x 10
= 205 x 10
= 2050